NVIDIA GeForce GTX 880M 's Advantages
More VRAM (8GB vs 2GB)
Larger VRAM bandwidth (160.0GB/s vs 14.40GB/s)
1152 additional rendering cores
NVIDIA GeForce 930MX 's Advantages
Released 2 years late
Boost Clock has increased by 3% (1020MHz vs 993MHz)
Lower TDP (17W vs 122W)